How can you know you've been delving a bit too deep into SW, whether by reading or writing too much of it or something else. Can be things that might happen or things that actually did happen. I'll start - When in normal real life situations you mentally swear with "sithspawn." (Actually done that twice, fortunately not out loud!)
When I look at a compass that reads SW (South West) and instead automatically see the abbreviation for Star Wars instead.
When you think the SW marriage name change convention of "wife drops middle name, changes last name to middle name, and takes husband's last name as new last name, then goes by all three names when would normally go by first-last" would be a great thing to adapt in real life. But really, it kind of does seem better and more equitable than the current system, doesn't it...
I mean Han didn't become Han Organa did he? Mara Jade Skywalker, Leia Organa Solo... It's not all that equitable in Legends.
When you are laying in bed at 2am working through plots for the SW RPG you are in, and your mind it so confused as to what characters you have in what game doing what with who.........and now I have a headache again!
When things you hear or situations in RL inspire the thought: "Such and such character would say or do that."
I read both of the new Thrawn trilogies back to back last year and found myself looking at random art when I was out in public like "how could I use this to learn how to attack this Wendy's" or whatever
When your dog is misbehaving, and you say "don't do that..." in the same tone of voice as Luke does to Yoda on Dagobah.
When you realize at 3am that you need to write but know if you got up and booted your computer, that's how the fight would start
When I wrote papers in grad school, I used to amuse myself by innocuously slipping references to Star Wars dialogue in them. Not sharing one's optimistic appraisal of a situation. Keeping one's distance, but not looking like one was keeping one's distance. Etc. One of my best friends is a lawyer, and apparently he does the same thing during courtroom arguments. Though he also slips in Tolkien references for diversity's sake.
When you're at work and you misplace a few things in the wrong place, and you mutter to yourself, "no, no, no, no...this one goes here...that one goes there..."
When your net name is the name most the cosplay community know you as, and you have given up correcting them.